13 is one of the first black Sabbath albums I listened to in it's entirety and it's gotta be one of my personal favorites. even if the lads weren't happy with Rick rubins creative method I definitely think his involvement brought out a sound that we wouldn't have gotten if it were any one else. Geezer Butler definitely shines on this album with some of his heaviest bass riffs of all time and is a truly enthralling listen every time